Sounding-chamber for thermic telephones and other apparatus



PTETER DE LANGE AND ROBERT AERNOUT BARON VAN LYNDEN.

SOUNDING CHAMBER FOR THERMTC TELEPHONES AND OTHER APPARATUS.

APPLICATION FILED NOV. 4. I915.

Patented J an 20, 1920.

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m aw +0 UNITED STATES PATENT OFFICE.

PIETER DE LANGE AND ROBERT AERNOUT BARON VAN LYNDEN, OF UTRECI-IT, NETHER- LANDS, ASSIGNORS, BY MESNE ASSIGNMENTS, T0 AMERICAN THERMOPHONE COM- PANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

SOUNDING-CHAMBER FOR THERMIC TELEPI-IONES AND OTHER APPARATUS.

Application filed November 4, 1915.

To all whom it may concern:

I Be it known that we, PIETER DE LANGE and ROBERT AnRNoU'r BARON VAN LYNDEN, both subjects of the Queen of the Nether lands, and residing at Utrecht, in the Netherlands, have invented a new and useful Sounding-Chamber for Thermic Telephones and other Apparatus, of which the following is a specification.

Our invention relates to a sounding chamher for sound producers or receivers of any kind which are intended to be introduced into the auditory passage of the human ear. It relates more particularly to thermic telephones in which the sound receiver, owing to its small dimensions, can be brought into direct connection with the ear.

The object of the invention is to close the outside of the auditory passage in the most perfect manner possible by the sounding chamber introduced into said passage, in order to obtain a reproduction of sound weakened as little as possible, and to insure clear hearing even when the transmission of sound takes place accompanied by strong outside noises. This object is attained according to this invention by the sounding chamber being made of a round body forming its main base, and'of an auxiliary body supplementing the said base, which as regards its shape fits as accurately as possible the outer auditory passage widening outward and having different shape in different persons. After the introduction of the sounding chamber into the auditory passage, the two bodies fit exactly the inner wall of the latter and in that way close the auditory passage outward in a perfectly tight manner.

Owing to the sounding chamber consisting of a body always retaining the same round shape, and of an auxiliary body of variable shape detachably connected to the same, the manufacture on a large scale of'sound producers provided with the sounding chamber is greatly facilitated, and at the same time the shape of the sounding chamber can be fitted to the shape of the auditory passage of the user of the telephone by suitably shaping the auxiliary body supplementing the main base.

Two constructions according to this" in- Specification of Letters Patent.

Serial No. 59,618.

vention as applied to a thermic telephone are illustrated by way of example in the accompanying drawings.

Figure 1 shows a thermic telephone provided with the improved sounding chamber, in elevation, partly in section.

Fig. 2 is a vertical section of a thermic telephone connected to a sounding chamber of a modified construction.

Iiig. 3 is a section on line AB of Fig. 2, anc

Fig. 4c shows a plan of Fig. 2.

All the figuresare drawn to an enlarged scale.

The sounding chamber of the thermic telephone shown by way of example in Fig. 1, consists of a round body 9. provided with a soundopening 1, and of an auxiliary body 3 connected to the said body and located at one side thereof, the shape of which fits as accurately as possible the shape of the auditory passage. The auxiliary body 3 is preferably made from a mold of the auditory passage of the user of the sounding chamber. The auxiliary body 3 may be connected to the body 2 for instance by spring pins 4 on the one part engaging into correspondingly arranged holes in the other part.

In the construction shown in Figs. 2 to 4, the sounding chamber of the thermic telephone represented as a receiver is constituted by a round cap 5 connected to the telephone, provided with a sound opening 6.

This cap is fixed on a casing 17 the top of which is formed by a perforated plate 13. The lower portion of the casing is threaded, and screwed into it is a plug 18 which receives the two conductors 19 of a double formed to fit exactly the portion of the auditory passage corresponding to its position in the latter. On its lower face, the auxiliary cap 7 is provided with a hook-like member 8 which passes through a slot 9 of the cap 5, adjoining the opening 6. The hookshaped portion 10 of the intermediate mem- Patented Jan. 20, 1920. i i

her 8 is engagedby the central portion 11"ofv a double spring 12, the lateral portions of which are supported on the intermediate ,part 13 of the telephone. The auxiliary cap 7 is normally held by the spring 12 in the position shown in full lines in Fig. 2. On the introduction of the sound chamber into the auditory passage, the auxiliary cap 7 is pressed back against the action of the spring 12, so that it is brought into the position shown in dotted lines, in which, together with the cap 5, it closes the auditory passage outward in a perfectly tight manner. On the sound chamber being removed from the auditory passage, the auxiliary cap 7 again returns to its original position, the intermediate member 8 being guided, on the one hand, by the slot 9, and on the other hand, by means of its cam face le by the side of the opening 6. The cap or auxiliary body 7 is thus connected with the base or main body 5 movably and yieldingly, and will adjust itself automatically to such a position relatively to said base as will conform most closely tothe users ear. The curvature of the base is preferably spherical, thus enabling the auxiliary body or cap to remain in proper engagement with the base when moving on said base between the two limit positions indicated in Fig. 2, such movement being transverse to the longitudinal axis indicated by the section line AB.

Owing to the auxiliary cap 7 covering the sound opening 6 and the adjoining guide slot 9, penetration of dust and dirt particles or the like into the sounding chamber is avoided as far as possible.

The sound ng chamber described may be used not only in connection With telephones of any k nd. but also for other sound-transmitting instruments.

We claim:

1. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a base having a ball-shaped end, and an auxiliary body attached to said base and having a concave surface engaging the convex surface of the base, and a convex free surface, and forming a one-sided bulge on said base.

2. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human car, a spherically-rounded body forming the base of said sounding chamber, and a separate auxiliary body engaging the convex surface of said rounded base and projecting therefrom asymmetrically to form a one-sided bulge which enables the sounding chamber to be fitted more accurately to such passage.

3. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a base having a curved end,

and an auxiliary body forming a one-sided v bulge movable transversely along said curved end of the base.

4:. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a round body forming the base of said sounding chamber, and a resiliently secured auxiliary body engaging said round body and projecting therefrom asymmetrically to form a one-sided bulge which enables the sounding chamber to be fitted more accurately to such passage.

5. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human car, a round body forming the base of said sounding chamber, and a detachable cap secured to said base and engaging it at one side only, to form an asymmetrical bulge on the side of said base, to conform more closely to the shape of such auditory passage.

6. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human car, a round body forming the base of said sounding chamber, and a cletachable cap mounted on said body at one side thereof, to enable the sounding chamber to be fitted accurately to the auditory passage of the individual user.

7. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a round body forming the base of said sounding chamber and a detachable cap mounted on said body at one side, said cap and body fittingsaid auditory pa ssage, and resilient-means connectmg said cap with said body. I

8. In a sounding chamber for sound producers .or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a round body forming the base of said sounding chamber and a detachable cap mounted on said body at one side, said cap and body fitting said auditory passage, and means for guiding said cap on said body.

9. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a round body. forming the base of said sounding chamber, and a detachable cap mounted on said body, said cap and body being adapted to fit said auditory passage, resilient means connecting said cap with said body, a sound opening in said body, a slot connected with said opening, and means for guiding said cap in said slot. 10. In a sounding chamber for sound producers or receivers of any kind, intended to be introduced into the auditory passage of the human ear, a. round body forming the base of said sounding chamber, a detachable cap mounted on said body, said cap and body being adapted to fit said auditory passage, a sound opening in said body, a slot connected with said opening, a projection on said cap adapted to be guided in said slot, and a spring held firmly in relation to said body and engaging said projection.

11. A casing containing a sounding chamber for sound producers or receivers of any kind intended for introduction into the auditory passage of the human ear, and provided at one end with a self-adjusting movable bulge forming an asymmetrical extension of said casing, whereby upon being placed in the ear the said bulge will automatically adjust itself to the shape of the auditory passage.

12. A casing containing a sounding chamber for sound producers or receivers of any i kind intended for introduction into the auditory passage of the human ear, and provided with a lateral bulge movable to different positions relatively to the main portion of said casing.

13. A casing containing a sounding chamber for sound producers or receivers of any kind intended for introduction into the auditory passage of the human ear, and provided with a separate lateral bulge movable relatively to the body of said casing, to assume different positions thereon, and also detachably connected with said body.

In testimony whereof, we have signed this specification.

PIETER DE LANGE. ROBERT AERNOUT BARON VAN LYNDEN. 

